P2812 on 2020-2021 Cadillac CT5 — Pressure Control Solenoid "G" Control Circuit/Open
1 vehicles · 1 makes
Most Reported On
P2812 is an OBD-II diagnostic trouble code meaning “Pressure Control Solenoid "G" Control Circuit/Open.” This code means the transmission control module detected an open (broken) electrical circuit for pressure control solenoid "G". Pressure control solenoids regulate the hydraulic fluid pressure that applies the transmission's clutches and bands to produce each gear. An open circuit means the module can't properly command that solenoid, which commonly causes harsh shifting, slipping, or limp mode. It is usually an electrical or solenoid fault rather than mechanical wear. This code is most commonly reported on 2020-2021 Cadillac CT5.
Common Causes
Diagnostic Tools
To diagnose P2812, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
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A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
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BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
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LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
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Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
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FAQ
What does P2812 mean?
P2812 stands for "Pressure Control Solenoid "G" Control Circuit/Open." This code means the transmission control module detected an open (broken) electrical circuit for pressure control solenoid "G". Pressure control solenoids regulate the hydraulic fluid pressure that applies the transmission's clutches and bands to produce each gear. An open circuit means the module can't properly command that solenoid, which commonly causes harsh shifting, slipping, or limp mode. It is usually an electrical or solenoid fault rather than mechanical wear.
What are the most common causes of P2812?
The most common causes of P2812 are: Faulty pressure control solenoid "G", Open or broken wiring in the solenoid circuit, Corroded or disconnected connector, Damaged internal transmission wiring harness, Low or dirty transmission fluid affecting the solenoid, Faulty transmission control module. The specific cause varies by vehicle.
How much does it cost to fix P2812?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P2812?
Au7o has documented P2812 across 1 vehicle models from 1 manufacturers: Cadillac.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.